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Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail) | 3 Months Ended
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Mar. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items] |
All intangible assets, Amortization Period (in Years) | 1 year 9 months 18 days
In-place Leases [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
All intangible assets, Amortization Period (in Years) | 1 year 6 months
Leasing Commissions [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
All intangible assets, Amortization Period (in Years) | 4 years
Tenant Relationships [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
All intangible assets, Amortization Period (in Years) | 2 years 3 months 18 days

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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